Little Andrus Lake

Little Andrus Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. The lake bottoms out at 37 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. The lake is compact at 27 acres, with 1.0 miles of shoreline and little volume to buffer nutrient inputs. Within Cass County's 132 graded lakes, Little Andrus Lake ranks 93 — below the local median, though not at the bottom.

Little Andrus Lake has no invasive species recorded in Minnesota state databases as of 2020, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Little Andrus Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Little Andrus Lake — most use is by shoreline residents and their guests. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.